Biology11221
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10.0 of calcium carbonate was heated. the mass of calcium oxide left was 5.6. calculate the mass of carbon dioxide produced in the reaction.

Please give a step by step answer
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Pigster
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(Original post by Biology11221)
10.0 of calcium carbonate was heated. the mass of calcium oxide left was 5.6. calculate the mass of carbon dioxide produced in the reaction.

Please give a step by step answer
10.0-5.6=4.4

No other steps needed.
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Biology11221
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(Original post by Pigster)
10.0-5.6=4.4

No other steps needed.
Ooh thanks you, wait but what about this one?
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Biology11221
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(Original post by Pigster)
10.0-5.6=4.4

No other steps needed.
Copper oxide is reduced by excess hydrogen. Calculate the maximum mass of copper that could be obtained from 79.5g of copper oxide

CuO+H2—> Cu+H2O
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Pigster
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(Original post by Biology11221)
Copper oxide is reduced by excess hydrogen. Calculate the maximum mass of copper that could be obtained from 79.5g of copper oxide

CuO+H2—> Cu+H2O
Well, for that one, you do have to do some molar calcs.

How many mol of CuO do you start with? how many mol of Cu can that make? What mass of Cu is that?

You only need one algebraic formula.
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Biology11221
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(Original post by Pigster)
Well, for that one, you do have to do some molar calcs.

How many mol of CuO do you start with? how many mol of Cu can that make? What mass of Cu is that?

You only need one algebraic formula.
Oooh moler thingy! Thank you so much 🙏
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reinaadira
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(Original post by Biology11221)
Copper oxide is reduced by excess hydrogen. Calculate the maximum mass of copper that could be obtained from 79.5g of copper oxide

CuO+H2—> Cu+H2O
What year are you in?

You have to work out the moles of Copper Oxide I'm pretty sure and with Cu it is a 1:1 ratio so use that moles and the Mr of Copper to get the mass
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